package com.example.StrJson;

import java.io.*;
import java.nio.charset.StandardCharsets;
import java.nio.file.Files;

public class getString {
    //把一个文件中的内容读取成一个String字符串
    public static String getStr(File jsonFile){
        String jsonStr = "";
        try {
            FileReader fileReader = new FileReader(jsonFile);
            Reader reader = new InputStreamReader(Files.newInputStream(jsonFile.toPath()), StandardCharsets.UTF_8);
            int ch = 0;
            StringBuffer sb = new StringBuffer();
            while ((ch = reader.read()) != -1) {
                sb.append((char) ch);
            }
            fileReader.close();
            reader.close();
            jsonStr = sb.toString();
            return jsonStr;
        } catch (IOException e) {
            e.printStackTrace();
            return null;
        }
    }

    public static String readFile(String path) {
        StringBuilder laststr = new StringBuilder();
        File file = new File(path);
        if (!file.exists()) {
            return null;
        }
        BufferedReader reader = null;
        try {
            FileInputStream fileInputStream = new FileInputStream(file);
            InputStreamReader inputStreamReader = new InputStreamReader(fileInputStream, StandardCharsets.UTF_8);
            reader = new BufferedReader(inputStreamReader);
            String tempString;
            while ((tempString = reader.readLine()) != null) {
                laststr.append(tempString);
            }
            reader.close();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            if (reader != null) {
                try {
                    reader.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return laststr.toString();
    }


}
